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![[Post New]](/templates/default/images/icon_minipost_new.gif) 1 Apr 2008 13:14:04 IST
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I solved and got answer b) but I have a doubt in my approach.So please try.
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Let us learn to dream, gentlemen, and then perhaps we shall learn the truth.
- August Kekule |
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1 Apr 2008 15:59:09 IST
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BUMP!
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Let us learn to dream, gentlemen, and then perhaps we shall learn the truth.
- August Kekule |
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1 Apr 2008 16:16:04 IST
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a)
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1 Apr 2008 16:21:26 IST
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Show solution?
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Let us learn to dream, gentlemen, and then perhaps we shall learn the truth.
- August Kekule |
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consider the cylinder in the gap( of dia R-r)
is rotaing abt itself with w and has a COM velocity=V(which itself is changing dir continuously)
now wat v need to do is solve for this V
then V/(R+r)/2 will be the ans we need
now chk @ the inner boundary:
the equation for pure motion is
rw1 + V=(R-r)/2 *w(note tht this w is not what v actually want to calculate)
the V comes here due to rel motion bet the 2 things
similarly v also have @ outer boundary:
Rw2 -V=(R-r)/2 *w
equating the 2 v have:
rw1 +V=Rw2 -V
so V=(Rw2-rw1)/2
so the thing v need is V/(R+r)/2 =Rw2-rw1/R+r
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1 Apr 2008 16:38:02 IST
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well???
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1 Apr 2008 16:43:45 IST
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the answer is A
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1 Apr 2008 16:44:12 IST
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Impossible To be Impossible is Impossible |
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1 Apr 2008 16:56:04 IST
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Distance of the centre of the required cylinder from the centre of the concentric cylinders.
Well done computer01.
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Let us learn to dream, gentlemen, and then perhaps we shall learn the truth.
- August Kekule |
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1 Apr 2008 17:01:52 IST
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edit
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Impossible To be Impossible is Impossible |
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1 Apr 2008 17:11:25 IST
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Impossible To be Impossible is Impossible |
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1 Apr 2008 17:38:09 IST
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R-r/2 is only the radius of the cylinder and not the distance of its centre from the centre of the concentric circles. Distance is R-r/2 + r = R+r/2
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Let us learn to dream, gentlemen, and then perhaps we shall learn the truth.
- August Kekule |
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1 Apr 2008 17:40:50 IST
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Impossible To be Impossible is Impossible |
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1 Apr 2008 23:18:07 IST
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Looks like the answer is option B.
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1 Apr 2008 23:19:53 IST
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i wish u wud read thru the prev soln :\
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